U+2990 "⦐" Right Square Bracket with Tick in Top Corner Unicode Character

U+2990 "⦐" Right Square Bracket with Tick in Top Corner is a specialized typographic symbol used primarily in mathematical notation and formal logic. It features a standard right square bracket with a small inward-facing tick or hook at its upper corner, distinguishing it from a plain bracket. This character often serves as a delimiter in sets, intervals, or complex expressions, where the tick indicates an exclusive or half-open boundary on the top side, similar to how a half-open interval is denoted in interval notation. Its inclusion in Unicode supports precise typesetting in academic and technical documents, ensuring clarity in symbolic communication without relying on makeshift alternatives.